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Question

The value of the determinant ∣ ∣ ∣b2abbcbcacaba2abb2abbcaccaaba2∣ ∣ ∣

A
abc
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B
a+b+c
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C
0
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D
ab+bc+ca
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Solution

The correct option is C 0
∣ ∣ ∣b2abbcbcacaba2abb2abbcaccaaba2∣ ∣ ∣

=∣ ∣ ∣(ba)bbc(ba)c(ba)aab(ba)b(ba)cca(ba)a∣ ∣ ∣

=(ba)2∣ ∣bbccaabbccaa∣ ∣

=(ba)2∣ ∣bbcaabcca∣ ∣(ba)2∣ ∣bccabbcaa∣ ∣

=0+0=0 since two columns in each determinant are identical.

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